CVE-2018-18493

NameCVE-2018-18493
DescriptionA buffer overflow can occur in the Skia library during buffer offset calculations with hardware accelerated canvas 2D actions due to the use of 32-bit calculations instead of 64-bit. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.4, Firefox ESR < 60.4, and Firefox < 64.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-1605-1, DLA-1624-1, DSA-4354-1, DSA-4362-1
NVD severityhigh (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid69.0-1fixed
firefox-esr (PTS)jessie52.8.1esr-1~deb8u1vulnerable
jessie (security)60.9.0esr-1~deb8u1fixed
stretch60.7.1esr-1~deb9u1fixed
stretch (security)60.9.0esr-1~deb9u1fixed
buster60.8.0esr-1~deb10u1fixed
buster (security)60.9.0esr-1~deb10u1fixed
bullseye60.8.0esr-1fixed
sid68.1.0esr-1fixed
thunderbird (PTS)jessie1:52.8.0-1~deb8u1vulnerable
jessie (security)1:60.9.0-1~deb8u1fixed
stretch1:60.8.0-1~deb9u1fixed
stretch (security)1:60.9.0-1~deb9u1fixed
buster1:60.8.0-1~deb10u1fixed
buster (security)1:60.9.0-1~deb10u1fixed
bullseye, sid1:60.9.0-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)64.0-1high
firefox-esrsource(unstable)60.4.0esr-1high
firefox-esrsourcejessie60.4.0esr-1~deb8u1highDLA-1605-1
firefox-esrsourcestretch60.4.0esr-1~deb9u1highDSA-4354-1
thunderbirdsource(unstable)1:60.4.0-1high
thunderbirdsourcejessie1:60.4.0-1~deb8u1highDLA-1624-1
thunderbirdsourcestretch1:60.4.0-1~deb9u1highDSA-4362-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2018-29/#CVE-2018-18493
https://www.mozilla.org/en-US/security/advisories/mfsa2018-30/#CVE-2018-18493
https://www.mozilla.org/en-US/security/advisories/mfsa2018-31/#CVE-2018-18493

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